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Thread: weld question

  1. #1

    Default weld question

    I found a pic of a SOA setup where they welded one leg of the perch to the axle tube and the other to the casting for the diff. I have always heard that welding to cast is a bad idea. Anyone done this or know when you can and can't weld to it?

  2. #2

    Default

    Its not impossible to do, just very difficult to get a good weld on cast. It also depends whether its cast iron or cast steel. I am not sure whether axle center sections are generally cast iron or cast steel. If you do it right, there is nothing wrong with it. Here are a couple of links with some good reading in them.

    http://www.lincolnelectric.com/knowl...ronpreheat.asp

    http://www.esabna.com/EUWeb/oxy_handbook/589oxy16_1.htm
    68 M-715
    67 M-725

  3. #3

    Default

    It's cast iron. I've had great results using nickel rod. Many guys just use a wire feed with a pre-heat and maybe a post heat.

  4. #4
    Join Date
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    Winlock, WA
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    Default

    http://www.ifsja.org/forums/vb/showt...highlight=weld

    Read that for some GOOD real world info on welding to the pumpkin.

  5. #5
    Join Date
    Sep 1998
    Location
    Winlock, WA
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    Default

    In case you miss the link in that post.

    http://members.cox.net/tadsal/beatthepig1.JPG

  6. #6
    Join Date
    Dec 2006
    Location
    KINGSPORT, TN.
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    Default

    its cast steel guys, ccast iron is brittle

  7. #7
    Join Date
    Sep 1998
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    Default

    Bob's right, cast steel isn't that big of a deal to weld to.
    Look at the second link I posted to see just how STRONG it really is.
    Plus some ideas of different ways they did it. Nickel helps for a better weld.

  8. #8

    Default

    Thanks guys, I was a little squimish of welding to it but it seems to be plenty strong for anything short of monster trucks.

  9. #9

    Default

    Quote Originally Posted by BCOWANWHEELS View Post
    its cast steel guys, ccast iron is brittle
    Can you provide a source?

    Carrier construction: malleable iron (fine grain cast iron)

    Ring and Pinion construction: 8620 heat treated

    Differential housing construction: Nodular iron

    Axle tubes construction: mild steel

    Inner knuckles (aka tube forks, end forgings, or "Cs") - forged, premium low-carbon mild steel

    Outer knuckle construction: malleable iron

    Axle tube to diff interference fit: .006" - .010"

    Axle tube to inner yoke (C) interference fit .003" - .005"
    From here


    http://www.pirate4x4.com/tech/billav...ont/index.html

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